Why wires are used according to the current rates

Wires are so important to electricity. Without wires you can't imagine how the world will be. We have different size of wire and these wires are installed according to the current rating. So why do wires installed in that way? Well dummies you really need to know why!! you are in right place ton know it. Lets get start.

In wires two good electrical conductors are used. We know the popular one in electricity world is copper. Another cheap and lightweight electrical conductor is Aluminum. So these conductors comes with different size,diameter,length but these factors are only determine by the resistance of electrical conductor. 

Not all electrical conductors are pure. It has some resistance too. Even the best electrical conductor silver has resistance 1.59. x10^-8.So Copper has 1.68 x10^-8 The resistance value cause the voltage drop if the wire length increase. From the resistance of copper, the length,size,core of the wire is determined. There's a list to identify the current capacity,voltage drop according to the size of wire.

The voltage drop is effect the wire,but it effect the efficiency like energy loss in form of heat. So the right current is choose in right size to flow the current in the conductor. So the it won't effect the efficiency of the wire and the energy loss can be reduce.

In house or industrial wiring, the voltage drop is care about much because the wire length isn't long so the voltage drop may occur in small amount. So dummies if you want to do a house or industrial wiring, make sure you choose right size of wire.

ELECTRIFYING FACT OF THE DAY :
YOU CAN USE ANY COLOR OF WIRE IN ORDER TO LOWER THE COST,
BUT IT'S AGAINST THE RULES OF ELECTRICAL ORGANIZATIONS DEPENDS
ON COUNTRY.